In order to better understand the impact of shafting vibration on the acoustic radiation of ships, a certain test-bench shafting is taken as the research object, and the simulation analysis is established based on the Workbench software to study the vortex frequency and response of shafting cyclotron vibration, and the impact of shafting vibration on the bearing base. The results show that the natural frequency of cyclotron vibration calculated by the finite element method is consistent with that of the traditional transfer matrix method. Based on the analysis of shafting excitation force, the analysis method of finite element method cyclotron vibration response is given to obtain the displacement response of shafting vibration. The frequency domain excitation force at the bearing is extracted and applied to the stern bearing to obtain the vibration response acceleration at the point on the stern bearing base. The test-bench test scheme is designed to verify the calculation correctness of shafting vibration displacement response and bearing base vibration acceleration response through tests. The calculation method according to the vortex frequency and response of shafting cyclotron vibration based on the finite element method can provide a certain theoretical guidance for promoting the research of shafting vibration on the acoustic radiation of ships.